Talking-machine.



W. H. PUMPHREY.

TALKING MACHINE.

APPLICATION FILED oc.5.I9II.

Patented May 11,4 1915.

2 4SHEETS--SHEET 2.

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ATE T 'WALTER HYER PUMPHREY, OF NEW YORK, N. Y., ASSIGNOR TO AMERICANGRAPHO- PHONE COMPANY, F BRIDGEPORT, GINIA.

CONNECTICUT, A CORPORATION OF `WEST VIR- TALKING-MACHINE.

' T0 all whom it may concern Bo .it known that I, WALTER H. PUMrnREY, acitizen of the United States of America` residing at New York, in theboroughiof Manhattan, countyand `State of New York, have inventedcertain new and useful Improvements in Talking-Machines, of which thefollowing is a specification.

My invention relates generally to talkingmachines and has particularreference to the mounting 'of the tonearm thereof.

The obj ect'of the invention is to produce a mounting for the tone-armemploying a minimum number of parts, of extremely simple construction,which may be manufactured at a comparatively low cost and quicklyassembled.

`A further object is to 'arrange the parts in such relation as to makethem 'readily accessible and facilitate their removal for purposes ofexamination or repair, etc.

A further object is to minimize friction in the mounting without in anyway interfering with or limiting the freedom of movement of thetone-arm. i

These and other objects and advantages are attained by the constructionhereinafter described.

The accompanying drawings will serve to illustrate mechanism suitablefor carrying my invention into effect. I wish it understood, however,that I do not limit myself to either the exact form or the detailsshown,

i as various changes may be made within the meaning of the presentinvention.

In the drawings: Figure 1 1s a longitudinal section illustrating theapplication of my invention to a well known type of here shown, having aturn-table mounted thereon as a support for a disk type of record, withwhich a sound reproducer 2 is adapted to cooperate, in the usual manner.

The sound-box or reproducer 2 is secured to the free end of a tone-arm3, which is mounted at 4, as will be hereinafter de- Specication ofLetters Patent.

`ably secured thereon Patented May 11, 1915.

Application filed October 5, 1911. Serial No. 652,916.

scribed, to have movement and swing freely in both vertical andhorizontal planes, in'

oider that the stylus of the reproducer may track in the record-grooveand be fed across the disk by it, in the usual manner.

The mounting, shown at 4, serves to connect the tone-arm and-thesound-amplifying means, which latter appears here as a concealed horn 5,i'. e. a horn contained within the cabinet, and as the shape andarrangement of the same form no part of the present invention, it willnot be further described.

rIhe preferred construction of mounting is illustrated in Fig. 1, andtakes the general form of a ball-and-socket joint, the end .6 of thetone-arm being shaped exteriorly It will be observed that the annularsur-v face or wall of the opening? meets the spherical surface of thetone-arm in tangential relation throughout the circumference thereof,and that thc line of contact coincides with the plane of the upper suiface or bearing 10 of the ringplato and also with the center of thespherical enlargement of the tone-arm. The ring-plate, thus arranged,prescn'ts two annular converging surfaces which meot or intersect alonga circular line. y T heee are the surface 7, serving to center thetone-arm in the mounting, and the bearing surface 10, acting as asupport on which the arm maintains itself by its own weight, and onwhich it is freely movable both vertically and horizontally. This bringsthe vertical and the horizontal axes where they intersect in the planeof the surface 10.

As shown, the mounting vfor the tone-arm is made up of separablesections, one ofA which is the ring-plate 8, above referred to. The basesection 11 has the ring-plate removby screws l2, and is preferably eutaway interiorly as at 13, to clear the spherical portion of the tone-armin all positions to which the latter may be swung.

vOrdinarily, the tone-arm will maintain arm `but encircles it above thepoint the mounting.

-is being shipped or itself in operative relation to the bearings by itsown Weight; but when the machine moved about from place to place, or isinthe hands of careless users, it is desirable t provide means forholding the 4arm in position. For this purpose, a lthird section 14 maybe employed in the form of a retaining-ring, as shown in Fig. 2. Thering 14 is cut away interiorly to normally clear the spherical portionof `the toneclosely enough at 15, of greatest diameter, to preventaccidental removal of the arm from From the foregoing, 'it' will be seenthat only one section of the mounting is in contact with the arm andthat such contact is limited to the engaging faces of the projections 9onfthe bearing 10.; The tangential relation between the wall oftheopening 7 of the arm-supporting bearing l0, miniinizes friction andreduces the function of .the

bearing 7 yto that of a mere guide to maintain the arm in centeredrelation in the on or off; and for the such movement to the It isdesirable to limit the swing of the tone-arm across the record, and forthis purpose'the lretaining-ringr 14: maybe cut aw y as shown,`toprovide shoulders 16, 1G, which co-act with the projections 9, as stops.

Fig. 3 I h mounting having the same general characbutin this instance ahelical spring 17, centrally located interiorily of the arm andmounting, isf' substituted for the retainingring 14I shown in Fig. 2,and serves to yieldingly maintainthearm in operative relation in themounting, and against accidental removal.

The form of arm and a mounting illustrated inrFi s. llfand 2 isspecially adapted for automatlcally operating a motor-brake of the typedisclosed and claimed in my prior PatentvNo.' 1,006,128, granted Oct.17, rake referred to is of the springthrown type but requires to bepositivelyad- -vancedorretracted a definite distance before thespringacts to throw the brake either purpose of imparting brake, there mayformed on the spherical portion of the arm a`.l'1p `18, shaped to enterthe notched end ".19 of n lever 20, pivoted at 21, in a S101: 22

'ducer' clear of ..1n th Inected through a' rod 23 .50 24 e base sectionof the mounting, and conwith the brake-lever Thus arranged, upwardmovement of the tone-arm to lift the sound-box or reprothe record, willbe imparted to shift the brale far enough for the same; and

ave shown a one-piece 'end as a downward movement of the sound-box (toplaying position on the record) will, in a similar manner, betransmitted to cause the spring to act in throwing off the brake.

The lip 18 on the tone-arm is given such length as to insure itsremaining inengagement with the notched -end of the lever 20, in any andall positions to which the tonearm may be swung, and when suilicicntlyextended, retaining-ring lt'may be dispensed with.

The many important advantages of. my invention will be apparent from theforegoing, as will also the mode of operatini and use and furtherdescription thereof will not begiven.

Having, therefore, described my invention, I'elaim:

. l. In a talking machine, of a tone-arm supporting ring provided with abearing surface, and a tone-arm arranged to haveboth vertical andhorizontal movements, the axes of which movements intersect in theplane. of said bearing surface.

2. In a talking machine, the combination of a horif/,ontallydisposedtone-arm 'supporting ring provided with a bearing surface, and `atone-arm shaped at one end as a portion of al sphere, and arranged tohave both vertical and horizontal movements, the axes of which movementsintersect in the plane of said bearing surface.

3. A tone-arm shaped eXteriorly at one end as a portion of a sphere, anda mounting for the spherical end of the arm comprising a member havingtwo annular surfaces relatively arranged to contactp'ith the arm onlv ina plane passing through the center of the sphere, one of said Vsurfacesforming a bearing surface.

4. A tone-arm shaped exteriofnly at one the reverse or ing a memberhaving two annular surfaces relatively arranged vto contact 'with .thearm. only in a plane passing through the center of the sphere, one ofsaid ing ay bearing surface, and retaining means for the arm above saidbearing surface.

5. A tone-arm shaped exteriorly at one portion of a sphere and amounting for the shaped end of the arm comprising a bearing memberhaving /twoannular surfaces relatively arranged to contact with the armonly in a plane passing through the center ofthe spherical portionthereof, and a removable retaining ring forA the arm above the bearingmember.

G. A tone-arm shaped exteriorly at one end as a portion of a sphere anda mountingT for the shaped end of the arm comprising a bearing memberhaving two annular surfaces relatively 'arranged to contact with the armonly :in-a

plane passing surfaces formthrough the center of the spherical portionthereof, a removable retaining' ring oithe anni above the hearingmember, and coacting means on the tone-ann andi mounting to liniit themovement of the afin.

l1 ln a talking inaehine, the combination `of a tone-afin bearine'ei1rfaoe,aiid a toneain arranged to have both vertical. and horizontalmovements, the axes of which movements intersee'f'; in the piene of Saidhearing' surface., forni of n, portion of a sphere Contacting with saidhearing surface only in the plane of said staff-ace.

8. 'ln a talking machine, the Combination of an annular 'tone-arm heaingsurface, and a tone-aun arranged to have hoth Vertical and horizontalmovements, the' axes of which movements intersect in the planeU o'saidbearing surface, said tone-arm havlng,` a sphetical portion contactingwith said bearing surface only in 'the plane et sind l en rface.

9. In a talking; machine, the combination of' a horizontally disposedtone-arm loeaia ing suiface, anti. a A'tone-arm arranged to have" bothvertical and horizontal movements, the axes of which movementsint-eiseet in the plane of said' beni-ing sui-face,

said tone-arm having; :i pai't in the` of the supporting surface of saidring.

1L In n talking; niaehine, the combination of a tone-arm supporting ringhaving two surfaces which eonTe-ige and nieet in a circular line, an@Ltone-aun having'a part in the Lfoiin oi' a portion of a sphere 'whichcontacts with said ring only along said oirenlai line, saidtone-aimbeing arranged to have both 'vertical and horizontal moyeinents, tl eaxes of which nioyeinents'intersect in the plane of one of saidsurfaces.`

slt/ALTER HYER PUPHREY.

Vvtnesses C. A. L. lvessin, Ramen L, SCOTT

